Truck-bolster



(No Model.) 4 Sheets-Sheet 1.2

H. PRIES au J. J. CASEY.

TRUCK BOLSTER.

No. 588,777. Patented Aug. 24,1897.

E lllluniunmrummm# JMW 1 (No Model.) A 4Sheets-Sheet 2.. H. PRIES 8v J. J. CASEY.

. TRUCK BOLSTER.

Patented Aug. 24,1897.

(No Model.) 4 sheets-sheet 8.

H. PRIES 8v J. J.. CASEY.

TRUCK BOLSTER.

No. 588,777. Patented Aug. 24,1897.

Kram/animas.

(No Mrodel.)A 4 Sheets-Sheet, 4. H. PRIES 8: J. J. CASEY. TRUCK BOLSTBR.

No. 588,777, Patented Aug. 24.1897.

J2e veizoms UNrrnn STATES PATENT @Fri-Cr..

HERMAN rains AND JonN J. CASEY, or MICHIGAN orrY', INDIANA.

l TRUCK-BOLSTER.

` SPECIFICATION forming part of Letters Patent N o. 588,777', dated August 24, 1897.

Appui-.ation nea me s, 1897. serial No. 639,325. uio mais.)

To a/ZZ whom, t may concern:

Be it known that we, HERMAN PRIES and JOHN J. CASEY, citizens of the United States, residing' at Michigan City, in the county yof La Porte and State of Indiana, have invented certain new and useful Improvements in Truck-Bolsters; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable lothers skilled in the artto which it appertains to make and use the same.

Our invention relates to a novel construction in a truck-bolster for car-trucks, the oblject being to provide a device of the description which will sustain the maximum of loads consistent with the utmost lightness and cheapness of construction; and it consists in the features of construction and combinations of parts hereinafter fully described and claimed.

One feature of our invention consists in constructing our bolster mainly of rolled-steel channel-irons, two of which `form the side struts or compression members and one of which forms the tension member.

Another feature of our invention consists in bending the tension member so that its middle portion falls below the lower edge of the compression members and in interposing one or more vertical struts between saiddepending portion of said tension member and the adjacent lower edges of the compression members.

Another feature of our invention consists in so bending said tension member that its iianges extend upward-ly and securing the end portions of said tension member between said compression members or side struts by means of rivets or bolts passing through the webs of said side struts or compression members and through the end portions of the flanges of said tension member. l l

Another feature of our invention consists in joining said compression members together by means of plates riveted to the flanges thereof and by means of said vertical struts interposed between the tension and compression members to prevent "spreading of said compression members under excessive stra-in.

In the accompanying drawings, illustrating our invention, Figure 1 is a transverse vertical section of a truck, showing a bolster construct-ed in accordance withv our invention in side elevation. Fig. 2 is a top plan view of our bolster. Fig. 3 is a vertical longitudinal section of the same on the line 3 3 of Fig. 2. Fig. Ai is a side elevation of the same. Fig. 5 is a fragmentary sectional view of the same on an enlarged scale. Fig. 6 is a vertical transverse section on the line 6 6 of Fig. 5. Fig. 7 is a fragmentary side'elevat-ion of the same on an enlarged scale. Fig. 8 is a horizontal section onthe line 8 8 of Fig. 7. Fig'. 82L is an end elevation of the same. Fig. 9 is a vertical transverse section on the line 9 9 of Fig. 8. Fig. 10 is a fragmentary sectional view, on an enlarged scale, on the line 10 10 of Fig. 2. Fig. 11 is a side elevation of'a bolster constructed for a swing-motion truck. Fig. 12 is a vertical transverse section of the same on the line 12 12 of Fig. 11.. Fig. 13 is an end elevation of the same.

Referring now to said drawings, A and B indicate the side struts or compression members, and C the tension member of a truckbolster, which consist, preferably, of rolledsteel channel-bars, though it will be obvious that any other suitable material may be substituted. The flanges 1 and 2 of said members A and B extend outwardly, while the flanges of said member C preferably extend upwardly and aresecured at their end portions to the webs of said. members A and B by means of rivets 3, said tension member being mounted between said members A and B. Said members A and B are further secured together by means of a covering-plate 4, extending the entire length thereof, and between the outer edges of the ianges 1, to which said plate is secured by means of rivets 5. The center plate 6 and side bearings 7 are mounted upon said plate 4. Springplates 8 are secured upon the end portions of said flanges 2 of said compression members and are secured thereto by means ofrivets 9 and 10, said rivets 9 passing through the flanges 2 and said rivets 10 passing through upwardly-extendingribs 11 on said plates 8, through the webs of said compression members, and through theflanges 12 of theguides 13, thus serving a double purpose. Said plates 8 are further provided with ribs 14,A

extending transversely between the ribs 11, thusA obviously strengthening said plates.

Said tension member is bent at its middle portion 15, so that its end portions 16 extend upwardly at an incline therefrom between the members A and B, to the webs of which they are secured byv means of the rivets 3 and 17, said rivets 3 passing through the webs of said compression members and said rivets 17 passing also through the flanges 19 of the guides 13. Struts 2O are interposed between said middle portion 15 ot' said tension member C and the adjacent portions of said members A and B, said struts being secured by rivets 21 to the web of said member C and by means of rivets 22 to the webs of said members A and B, and are provided between their ends with outwardly-extending flanges 23, which are adapted to engage the lowei` faces of the flanges 2 of said members A and B. Said struts 20 are provided with crossribs 24, which obviously strengthen the same and prevent the adjacent portions of the members A and B from spreading. In the figures of the drawings hereinbefore referred to we have shown two of said struts 20, but it will be obvious that this number can be increased or diminished without departing from the spirit of our invention, and in Fig. 11 we have shown only one of said struts. this ligure shows a modified construction of our bolster for use in swing-motion trucks it' will be obvious that the modification can also be applied to the bolster for rigid trucks. (Shown in Figs. 1 to 10, inclusive.)

The bolster shown in Figs. 11 to 13, inclusive, differs only in that instead of the guides 13 end bearings are used which hold the bolster centered between the struts 25 of the truck.

A bolster constructed in accordance with our invention is verylight and cheap to manufacture, but will bear a very heavy load comlpared to its weight.

IVe claim as our invention* l. A truckbolster, comprising side struts or compression members composed of channel-irons, a tension member secured between said compression members, and struts interposed between said compression and tension members, substantially as described.

2. A truck-bolster comprising side struts or compression members consisting of channel-irons, a tension member consisting of a channel-iron bent at its middle portion and secured at its end portions between said side struts, and struts interposed between said tension member and the lower edges of side struts, substantially as described.

3. A truck-bolster, comprising side struts or compression members consisting of parallel channel-irons having outwardly-extending flanges, a tension member consisting ot' a channel-iron having upwardly-extending flanges bent at its middle portion so as to depend below said side struts and secured to the webs of said side struts by means of riv- Though ets or the like passing through the flanges of said tension member, and means for transferrin g the load on said compression members to said tension member, substantially as described.

4. A truck-bolster, comprising side struts or compression members consisting of parallel channel-irons having` outwardly-extending flanges, a tension member consisting of a channeliron having upwardlyextending flanges bent at its middle portion so as to depend below said side struts and secured to the webs of said side struts by means of rivets or the like passing through the flanges of said tension member, and means for transferring the load on said compression members to said tension member, consisting of vertical struts interposed between the depending middle portion of said tension member and the lower flanges of said compression members, substantially as described. I

5. In a truel-bolste1', the combination with side struts having parallel vertical webs, of a tension member secured between said side struts and depending below the same at its middle portion, and means interposed between said depending middle portion of said tension member and the adjacent lower edges of said side struts for transferring the strain upon said side struts to said tension member, substantially as described.

6. In a truck-bolster, the combination with side struts having parallel upright webs, of a tension member having parallel upright lianges secured at their end portions to the webs of said side struts, and bent at its middle portion to depend below said side struts, and :means interposed between the lower edges of said side struts and the web of the bent portion of said tension member for transferring the strain upon said side struts or compression members to said tension member, substantially as described.

7. A truck-bolster, comprising side struts consisting of parallel channel-irons having outwardly-extending langes, a plate mounted upon said side struts and secured to the upper flanges thereof, a tension member consisting of a channel-iron having upwardly-extending Iianges secured at their end portions to the webs of said side struts, and bent at its middle portion so as to depend below said side struts, and struts secured to the web of said ten-sion member and bearing against the lower edges of said side struts for transferring the strain from said side struts to said tension member, substantially as described.

In testimony whereof we affix our signatures in presence of two witnesses.

HERMAN PRIES. JOI-IN J. CASEY.

ICQ

IIO 

